Techies and Mahendra

Intrusive related gold usually contains copper and is often associated
with tin, tungsten, molybdenum, antimony and uranium, though not always
with the latter 3.


You really need to know where your alloys originate and whether they have
already been through a second refining (recycling) process.

Bonne chance mon ami!

Graham Naisbitt

Gen3 Systems

-----Original Message-----
From: harvey <[log in to unmask]>
Reply-To: TechNet Forum <[log in to unmask]>, harvey
<[log in to unmask]>
Date: Tue, 6 Mar 2012 08:57:41 -0800
To: TechNet Forum <[log in to unmask]>
Subject: [TN] Fw: Help. Is this true-- SOFT ERRORS FROM SOLDER??

>Could this be true only of 63-37 or would lead-free SAC alloys also be
>potentially guilty of causing soft errors?
>
>
>
>----- Forwarded Message ----
>From: "Gandhi, Mahendra S (AS)" <[log in to unmask]>
>To: "[log in to unmask]" <[log in to unmask]>;
>"[log in to unmask]" <[log in to unmask]>;
>"[log in to unmask]" <[log in to unmask]>
>Sent: Tue, March 6, 2012 8:38:40 AM
>Subject: Help. Is this true??
>
> 
>Evidently regular solder has decaying Uranium in it, or somehow generates
>alpha 
>particles, which are being blamed for upsets.  Some chips are moving to a
>special ³low alpha² solder internally to avoid this problem on
>bump-grid-arrays 
>in  flipchip parts.
> 
> Mahendra Gandhi
>SME - PWB Technologies
>Aerospace Engineering
>One Space Park, M5/1085A
>Redondo Beach, Ca. 90278/*[log in to unmask]
>(Office: 310.813.6857 Fax: 310.812.8630
>
>______________________________________________________________________
>This email has been scanned by the Symantec Email Security.cloud service.
>For more information please contact helpdesk at x2960 or [log in to unmask]
>______________________________________________________________________


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________